我试图在生成网址时获取葡萄实体中的主机和端口
class Person < Grape::Entity
expose :url do |person,options|
"http://#{host_somehow}/somepath/#{person.id}"
end
end
我曾尝试检查选项哈希,但'env'哈希是空的。
答案 0 :(得分:2)
以下为我的作品,Grape 0.6.0,Grape-Entity 0.3.0,Ruby 2.0.0:
require 'grape'
require 'grape-entity'
# in reality this would be Active Record, Data Mapper, whatever
module Model
class Person
attr_accessor :identity, :name
def initialize i, n
@identity = i
@name = n
end
end
end
module APIView
class Person < Grape::Entity
expose :name
expose(:url) do |person,opts|
"http://#{opts[:env]['HTTP_HOST']}" +
"/api/v1/people/id/#{person.identity}"
end
end
end
class MyApp < Grape::API
prefix 'api'
version 'v1'
format :json
resource :people do
get "id/:identity" do
person = Model::Person.new( params['identity'], "Fred" )
present person, :with => APIView::Person
end
end
end
快速测试:
curl http://127.0.0.1:8090/api/v1/people/id/90
=> {"name":"Fred","url":"http://127.0.0.1:8090/api/v1/people/id/90"}
答案 1 :(得分:0)
最后,最终将主机作为选项发送给实体
class Person < Grape::Entity
expose :url do |person,options|
"http://#{options[:host]}/somepath/#{person.id}"
end
end
get '/' do
@persons = Person.all
present @persons, with: Person, host: request.host_with_port
end